I've made recommendations like that. Subaru too. The intention is not to make them handle like a late model car, well... in the bigger picture it is but that requires more than just alignment, although it helps, a lot.
The problem is many of the young "toe and go" alignment techs of today are unable to punch in specific numbers for an old car that are outside of the database recommendations, if they even have a database that goes back far enough. If you give them a late model car to punch up specs to, then they have a target to shoot for. Granted, a modern car will have even more aggressive specs, but when your mopar ends up a few degrees short of 2005 specs, you thank the kid, pay for the job, and head out down the road with an improvement over the Mopar factory spec of negative caster, positive camber.
However, you need to be somewhat cognizant of what your after to make decisions like these work in your favor. If you just walk in the shop and say "slap a 2005 WRX alignment on my car" and can't walk the kid through it, he will be confused by the lack of rear adjustment and think You are an idiot and you will be frustrated by his lack of ability and think He's an idiot. You're trying to provide a target point for them to shoot for knowing full well he probably can't hit it, but knowing that reaching a percentage of that goal is better than the 1970 specs you would otherwise get.
